New Ludgate is the transformation of a London City block into a lively new quarter near St. Paul´s Cathedral. At this historic site the new buildings One and Two New Ludgate offer flexibly designed office space with contemplative zones of loggias and terraces. Office workers will benefit from façades with an inspiring light concept.
In 2016 One New Ludgate won the Royal Institute of Chartered Surveyors’ top prize for Commercial Office Buildings. Floor-to-ceiling low-iron glazing offers spectacular views to St. Pauls Cathedral and the city and reduces the need for artificial light. The masonry grid of One New Ludgate keeps direct sunlight off the glass and throws light into the floorplates and, when viewed obliquely from the street’s wide pavements, gives a solidity to the building. With a unique interplay of colours in the façade Two New Ludgate provides special accents in the city of London. The coloured louvres can be closed manually in fixed positions and therefore offer a wide range of views. These Gartner façades are playing a substantial role to create stimulating office areas in this sustainable building and to improve the value of the building.
Dialogue between two striking and complementary new buildings
The site of New Ludgate is redolent with history. From here the Belle Sauvage coaching inn welcomed or saw off numerous fictional and real travellers; Pocahontas and London’s first live rhinoceros paid visits. Later came railway engineers who put an iron viaduct across Ludgate Hill, and World War II, which left the site in ruins.The site on the old city wall of Ludgate Hill was formerly home to some outdated 1980s office buildings, the tallest element of which breached Primrose Hill viewing corridor height restrictions, and which offered little in the way of public amenity, with a dull sunken arcade at its lower levels. London Architect Fletcher Priest was asked to masterplan the site by Land Securities, separating it into two headquartersized office buildings – 30 Old Bailey to the north, designed by Sauerbruch Hutton with Fletcher Priest as executive architect, and 60 Ludgate Hill, designed by Fletcher Priest. So a dialogue between two striking and complementary new buildings was set up. A new pedestrian route through the site was created that leads to an urban square or piazza to the east. Both landmark buildings were completed in spring 2015.
Offices offer accessibility to open space like a busy public piazetta or more contemplative zones of loggias and terraces
Prime office space of 349,555 sq. ft. with stimulating outside areas
One New Ludgate comprises nine storeys with retail shops and bars under glass awnings on the ground floor. The building boasts extensive external private space accessible from every office floor. This includes a loggia and a substantial south-facing terrace that provides uninterrupted views towards St Paul’s Cathedral. Two New Ludgate offers high-quality, up-todate office space with a restaurant and retail areas. A generously glazed double-height entrance hall continues the space of the street into the building. The upper floors offer flexible office space, and there is a roof terrace with sweeping views of St Paul’s Cathedral.
Both buildings offering prime office space of 349,555 sq. ft. with varied and stimulating outside areas. Offices offer accessibility to open space like a busy public piazetta or more contemplative zones of loggias and terraces. Integration between floors should improve the staff interaction. One New Ludgate has 154,856 sq. ft. office space and 24,960 sq. ft. retail space. Two new Ludgate has 195,239 sq. ft. office space and 5,880 sq. ft. retail space.
One New Ludgate with white precast concrete frames
At a height of 39m One New Ludgate building is animated by bars and retail outlets under fixed white glass canopies. A masonry grid keeps direct sunlight off the glass and throws light into the floorplates. White precast concrete frames, simply detailed, respect their neighbours and set off the floor-to-ceiling lowion glazing, while vivid amber ‘Kathedral’ glass fins are used on the piazzetta façade in the new public space, where a mature tree provides shade. Retail and restaurants line the ground floor, and come together in this new piazzetta. One New Ludgate also boasts extensive private external space, accessible from every office floor. This includes a set-back loggia and balconies and a substantial south-facing terrace at the fifth floor set-back level with uninterrupted views of St Paul’s which is capable of accommodating 300 people, landscaped by Gustafson Porter.
13,150 sqm façade with a storey-high glazing and curved elements
The façade of One New Ludgate with a total area of 13,150 sqm consists of 3,675 mm x 1,500 mm large elements with a storey-high glazing. The curved elements were manufactured with three different radii measuring 1 m, 6 m and 13 m. Sliding doors are installed on 1st, 5th and 7th floor. Rectangular louvres of stone and glass with a depth of 615 mm and a width of 125 mm frame the individual elements and provide of sun and glare protection. Life load deflections after the construction phase, axial reductions of columns and vertical thermal building movements cause an opening and closing of the horizontal joint in the façade of up to 12 mm. In order to take up the external vertical stone and glass louvres the joints had to be increased to maximum 30 mm. The horizontal overhanging and projecting louvres are supported by similar vertical louvres and are not anchored to the façade system.
Double glazing of laminated safety glass
The façade was provided with double glazing consisting of laminated safety glass (VSG) on the inside and on the outside in order to increase safety and burglary protection. The double glazing consists of 2 x 5 mm laminated glass VSG, float low-iron glass with ipasol 50/27, 16 mm cavity with argon filling, laminated glass VSG consisting of 2 x 5 mm float low-iron glass. The alternating installation of glass and stone elements in particular required a complex logistic planning. Installation was carried out exclusively in one direction. A glass element was always followed by a stone element. In addition, the storage area was severely restricted.
The glass louvres consist of an aluminium base frame on which the laminated glass was adhered to. These laminated glass units consist of 4 mm single Kathedral glass, four-colour interlayer, 8 mm heat strengthened low iron glass and an amber edge screen printing. The four differently coloured interlayers and the screen printing give the glass its unique colour. The small canopies on the ground floor form another special feature. These transparent roofs are partly three-dimensionally curved and span over 4.5 m between large columns.
Two New Ludgate with a unique interplay of colours, cranked and curved façades
With a unique interplay of colours in the façade Two New Ludgate differs from the architecturally connected One New Ludgate with its white louvres. The coloured louvres can be closed manually in fixed positions and therefore offer a wide range of views. Each of the storey high glazed elements of the 52 m high building has been provided with a GRC ledge on top and on bottom. 24 different colours in always other constellations make the curved façade elements unique in their appearance. The ceramic colours printed on the glass louvres also provide protection against the sun and glare. The design of the ensemble blends harmoneously into the environment along Limeburner Lane and Old Bailey.
Gartner provided the cladding for Two New Ludgate with a total façade area of 7,746 sqm. The elements of the cranked façade are 3,700 mm high and 3,000 mm wide; the elements of the curved façade are 3,700 mm high and 1,500 mm wide. Top and bottom areas have always been provided with GRC ledges. The corner elements have different sizes and angles. The elements themselves are flat but segmented and therefore have an arch-shaped arrangement. Life load deflections after the construction phase, axial shortening of the columns and vertical thermal building movements cause an opening and closing of the horizontal joint in the curved façade of up to 15 mm.
Glass louvres in 24 different colours
The façade was provided with a double glazing consisting of laminated safety glass (VSG) on the inside and on the outside in order to increase safety and burglary protection. The double glazing consists of 2 x 5 mm laminated glass VSG, low-iron glass with ipasol 50/27, 16 mm cavity with argon filling, laminated glass VSG consisting of 2 x 5 mm float low-iron glass. A special feature are the coloured glass louvres which can be adjusted manually via the façade access equipment in a variety of positions. Future users will be able to decide which areas should be hidden.
A steel façade with sharp steel edges was realized on the ground floor. In order to achieve this all mullions and transoms made of steel sheets were welded together to the required steel profile. For architectural reasons the outer and inner edges were designed with sharp edges.The glazing of the steel façade consists of 2 x 6 mm laminated safety glass (VSG), float low iron glass with ipasol 70/39 and a dark-grey edge screen printing, 24 mm cavity with argon filling, VSG 2 x 6 mm float, size: 1.5 x 4.2 m. The coloured glass louvres are made of 2 x 12 mm thermally toughened glass panes which are connected to one laminated VSG glass pane by means of a structural silicone bonding on top and bottom of the aluminium profiles. There are no aluminium profiles on the vertical sides.
The façade design of the entrance area is completely round. For this reason the handcrafted steel transoms had to be curved. The curved double glazing is 3 x 4.2 m large and consists of 2 x 8 mm laminated safety glass (VSG), float low iron glass with ipasol 70/39 edge screen printing, 16 mm cavity with argon filling, VSG 2 x 8 mm float.
BREEAM Excellent rating and convinced tenants
One and Two New Ludgate have been awarded with a BREEAM Excellent rating. The sustainability of the building was mainly influenced by a façade with a high amount of daylighting to reduce the need for artificial light on the office floors. The interesting architectural and façade concept also attracted the property market. Land Securities as owner has sealed a trio of lettings at One New Ludgate to the Commonwealth Bank of Austria, law firm Ropes & Gray and the marketing consultancy ZK Associates with a total area of 115,000 sq. ft. Also the 18,140 sqm high quality office space and the 550 sqm large retail of Two New Ludgate area have already been fully rented to Japanese bank Mizuho.